Remember that 400 cfm per ton of air conditioning is the target value. If required, raise or lower cooling the blower speed. After a blower speed change, recheck the external static pressure and ...

With this unit, you could efficiently operate two 90-lb. breakers simultaneously (90 cfm + 90 cfm = 180 cfm) or three 60-lb. breakers (60 cfm + 60 cfm + 60 cfm = 180 cfm).